You could always go into the store with a gas can (new, filled with water) and start acting really weird and fumbling with a road flare or lighter and see if you could get a refund. Slosh some gas on your shoes for smell effect, and just have fun with it!

You could always go into the store with a gas can (new, filled with water) and start acting really weird and fumbling with a road flare or lighter and see if you could get a refund. Slosh some gas on your shoes for smell effect, and just have fun with it!